Add easing effects to for e.g. scrollHorz effect

To use the jQuery easing plugin you need to install it first, see: Installation.

You can use e.g.
{"speedIn": 750,
"speedOut": 250,
"easeIn": "backinout",
"easeOut": "backin"}

To add easing effects, try this out with your scrollHorz effect to see what is the result. Also here you can see an example of the easing effect.